Faulty DATA???

I was reading an artcle and below it was these statistics;

DID YOU KNOW?
According to the Centers for Disease Control and Prevention, there are more than 4.7 million dog-bite victims a year in the United States. About 800,000 of those need medical attention and about 12 die.
· The top five breeds of dogs involved in human dog bite-related fatalities in the United States between 1979 and 1998 were pit bull-types, Rottweilers, German shepherds, husky-types and malamutes.
· In 2003, dog bites accounted for about one quarter of all homeowner's insurance liability claims, costing roughly $321.6 million, down slightly from about $345.5 the previous year. The average dog bite claim cost insurers $16,600.
· To limit their exposure to such losses, some insurance companies require dog owners to sign liability waivers for dog bites. Others charge more for owners of biting breeds such as pit bulls and Rottweilers and some are not offering insurance to dog owners at all.
Compiled by News Researcher Barbara Buttleman.
SOURCES: www.cdc.gov and www.iii.org

From what I read, it seems many of these dogs are running in packs, so where are the owners? Have these dogs been abandoned and running wild? They definitely do not sound like your typical, family loved pet companion... if in fact these dogs are what they say they are.
I read so often, when they are referring to Pit bulls, they indirectly say, 'appeared to be Pit bull'. Well, what is it? Is it a Pit bull or not? So with these statistics, are they assuming these dogs are Pit bulls as they 'appear to be'? How can statistics be correct when they aren't positive about what breed the dogs really are? Also, what do they mean by types, as in pit bull-types? Husky-types? Are they mixed breeds and if so, why do they not say the other breed types?
This brings me to two dogs I had, Bunny and her pup, Booboo. Bunny looked just like a collie and when I had her licensed, they put her down as a collie-X. Now as far as her one and only pup, they registered her as a shepherd-X. Why wasn't Booboo registered as a collie/shepherd-X? To me, it seems as if this is very faulty data they are basing their statisics on and therefore, invalid.
Wild dogs must eat as is their basic instict to survive. When abadoned, starving and running in packs, would you not assume their survival instincts would gain control as they hunt for food (other animals)? Therefore, we are no longer speaking of our loving campanions that responsible owners care for, yet this blame gets put on our breeds of dogs.
Just some food for thought.